﻿// Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
// Licensed under the Apache License, Version 2.0.

using ImageMagick;
using Xunit;

namespace Magick.NET.Tests;

public partial class MagickNETTests
{
    [Collection(nameof(IsolatedUnitTest))]
    public class TheSetRandomSeedMethod
    {
        [Fact]
        public void ShouldPassOrderedTests()
        {
            IsolatedUnitTest.Execute(() =>
            {
                ShouldMakeDifferentPlasmaImageWhenNotSet();

                ShouldMakeDuplicatePlasmaImagesWhenSet();

                ShouldMakeDifferentPlasmaImageWhenNotSet();
            });
        }

        private void ShouldMakeDuplicatePlasmaImagesWhenSet()
        {
            using var first = new MagickImage("plasma:red", 10, 10);
            using var second = new MagickImage("plasma:red", 10, 10);

            Assert.NotEqual(0.0, first.Compare(second, ErrorMetric.RootMeanSquared));
        }

        private void ShouldMakeDifferentPlasmaImageWhenNotSet()
        {
            MagickNET.SetRandomSeed(42);

            using var first = new MagickImage("plasma:red", 10, 10);
            using var second = new MagickImage("plasma:red", 10, 10);

            Assert.Equal(0.0, first.Compare(second, ErrorMetric.RootMeanSquared));

            MagickNET.ResetRandomSeed();
        }
    }
}
